Created in response to an environmental disaster, GRIIDC has always focused efforts on gaining trust with users. After the Deepwater Horizon oil spill in 2011, GRIIDC was tasked with rapidly developing a data repository for researchers funded by the Gulf of Mexico Research Initiative (GoMRI) who were currently conducting studies and had never shared data before. The repository also had to cater to multiple disciplines, given the broad environmental and sociological effects of the spill. Although researchers were mandated to share their data, enforcement was a challenge requiring time and effort. GRIIDC has learned to gain user trust by continuous communication through one-on-one support, training and workshops, and participation in conferences. GRIIDC also offers helpful services that address every step of the data management life cycle: planning, organizing, submitting, curating, and distributing. The dataset monitoring page allows data submitters, managers, and funding agencies the ability to track the status of a dataset throughout the GRIIDC data package review process. Following TRUST and FAIR principles, GRIIDC collects detailed metadata that includes standardized keywords, data use license, spatial extent, point of contact, parameters and units, among other information. Dataset landing pages contain information to help a user decide if they want to download the data, including methods, file format, point of contact in case a user has questions, and any associated publications. A suggested citation is provided to encourage proper credit of the author, instilling trust in the data sharing process and alleviating concerns about theft. Data are also curated to ensure they are properly documented with detailed metadata and are in non-proprietary formats that will be useful in the future. Providing easy to use submission and planning tools and multiple opportunities for training helps build and keep trust with users. Serving the 10-year GoMRI program has established a track record with users who are familiar with the GRIIDC system and are more willing to share data from other funded projects with GRIIDC. GRIIDC continues to prioritize user needs and develop features that follow FAIR and TRUST principles.